Through the publicity of road safety programme, the street accidents in purulia district are decreased by 10%in comparison to its previous year. if the number of street accidents in this year be 8748, let us write by calculating,the number of street accidents 3 years before in the district.
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Let the number of street accidents 3 years before in the district be x.
∴ At present the number of street accidents in that district= x(1-10/100)^3
By the condition,x(1-10/100)^3=8748
x= 90/100 * 90/100 * 90/100
x=8748*100*100*100/90*90*90
x=12000
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